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