Could you draw a diagram for us? I am having trouble picturing what you have described. 
Cylinder chess. Bishop moving to square of opposite color.
In my mind I am seeing it like a barber pole...I don't think the bishop would ever be able to move to a square of the opposite colour. What am I missing?
here is a cylinder chess board really shaped as a cylinder
But cylinder chess can also be played on a complete common chess board imagined to be a cylinder. Here is the bishops move illustrated on such a board

The diagonal c1-b2-a3 continues on h4-g5 and so on.
But imagine that there was no h-file. like on this board
It is now clear that the diagonal c1-a3 ( if we play cylinder chess ) continues on the white square h4.
Imagine playing cylinder chess on a board with an unequal number of files. That will mean that the bishop can move to square of the opposite color than the one it stands on!
I find this absolutely amazing!