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