One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,8,4,6)(9,10)(11,13)(12,14)(15,16)(17,18,21,25)(19,27,20,23)(22,24,30,26)(28,32,29,31)(1,3,5,4)(2,6,7,8)(9,11)(10,13)(12,15)(14,16)(17,19,21,20)(18,23,25,27)(22,28,30,29)(24,31,26,32)(1,4,5,3)(2,6,7,8)(11,15)(13,16)(18,24)(22,30)(23,31)(25,26)(27,32)(28,29)(11,15)(13,16)(17,20,21,19)(18,23,25,27)(22,29,30,28)(24,31,26,32)(10,14)(13,16)(19,20)(23,27)(28,29)(31,32) involution — undirectedA 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.