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