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