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