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