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