The evidence for design is my (and I assume your) experience.

There are 2 arguments based on it.

1) The fine tuning of the experience.

With physicalist theories there is no reason to have favoured the expectation of any particular physical activity to have correlated with experience over any other physical activity, or to have favoured what the experience that correlated with physical activity would be like.

Whereas theist theorists can explain why the experience that correlates to certain physical activity is like it is rather than being a flash of light every time a neuron fires for example. The latter wouldn't have been fit for purpose (making moral judgements based on it).

So it is a fine tuning argument, but the fine tuning of the experience, rather than the fine tuning of the physics constants, or the fine tuning of the planet's proximity to the sun, which could be explained by a multiverse, or the number of planets respectively. The fine tuning of the experience seems to me to be taken for granted and thus ignored, yet it part of the most telling arguments for design.

2) Our ability to respond to the experience.

A theist can explain it without it being explicitly observed (quantum randomness, and fluctuations of kinetic energy, and a being (God for example) which knows the fine adjustments that can be made (explainable by chaos theory) and the means to make them). Whereas with a reality without deities there is not (there is nothing that knows how the brain is configured). The theist can therefore explain how it is that my form can express that the person experiencing having it is infallible when it comes to the statement that "reality is not one in which none experience", for example. ]

Irony:

Those that believe reality is one without deities asking where is the evidence for design? Because the evidence is: all the evidence! As all evidence is that which is experienced, and it is what is experienced that is the evidence.

Debate restriction:

Some may go to the lengths of denying that they understand what is meant by experience, but I will not be drawn into that debate. If that is the way one of you wants to go, then I will just leave you to perhaps one day realise that you are being like one of those in the Emperor's New Clothes story that denied what they experienced in order (they thought) to appear intelligent.