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