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