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