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