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