Don´t think you need a layout guide for that chapter. It´s very free to place stuff, all you need is the embassies touching the senate. Then the respective production buildings connected to their embassy or itself, which means basically you can put stuff wherever you want to. And you can build one only of the embassies and as many as you like of the others.
The better question would be why play the chapter at all, it surely is the worst chapter in the game