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)(11,15)(12,14)(13,16)(17,18,22,27)(19,26,29,25)(20,23,28,24)(21,31,30,32)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,25)(20,31)(21,23)(22,29)(24,30)(26,27)(28,32) involution — undirected(10,14)(11,16)(17,20,23,27,22,28,24,18)(19,25,30,32,29,26,21,31)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,23,19,22,30,24,29)(18,26,20,31,27,25,28,32)(2,5)(6,8)(10,14)(13,15)(18,27)(20,28)(25,26)(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.