One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,14,15)(11,16,12,13)(17,18,22,27,23,28,21,26)(19,24,29,25,20,30,31,32)(1,3,4,7)(2,5,6,8)(9,11,13,10,14,12,16,15)(17,19,21,31,23,20,22,29)(18,24,26,32,28,30,27,25)(2,6)(5,8)(17,20,23,19)(18,25,28,32)(21,31,22,29)(24,26,30,27)(9,12,13,15,14,11,16,10)(17,21,23,22)(18,26,28,27)(19,29,20,31)(24,25,30,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.