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