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