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