If you pass along the JSON generated by your request, I can have a look and figure out what's wrong.
I think I need more specifics on exactly what doesn't work. I can see that the graphics layers are read correctly (they show some features in southern Texas), but many of them appear to have alpha values of 0 in the color definitions. For example, the outlines in your middle graphics layer. Those are treated as null colors in the output. Is that the problem -- that the graphics layers don't appear in your output?