One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,12,13)(11,14,15,16)(17,18)(19,27)(20,23)(21,25)(22,31)(24,29)(26,30)(28,32)(2,5)(6,8)(10,13)(11,14)(15,16)(17,19)(18,23)(20,21)(22,28)(24,31)(25,27)(26,32)(29,30) involution — undirected(1,3)(2,6)(4,7)(5,8)(9,11,12,15)(10,14,13,16)(17,20,21,19)(18,24,25,32)(22,28,30,29)(23,26,27,31)(3,7)(6,8)(11,15)(14,16)(19,20)(23,27)(24,32)(28,29) 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.