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