One vertex per element, one color per generator, with an edge from x to x·s.
(9,10)(11,15)(12,13)(14,16)(17,18,22,27)(19,26,29,23)(20,25,21,24)(28,31,30,32)(1,2)(3,7)(4,5)(6,8)(10,13)(14,15)(17,19)(18,23)(20,28)(21,30)(22,29)(24,31)(25,32)(26,27) involution — undirected(2,5)(6,7)(9,10)(11,14)(12,13)(15,16)(17,20,22,21)(18,24,27,25)(19,28,29,30)(23,31,26,32)(2,5)(6,7)(9,11,12,16)(10,14,13,15)(17,21,22,20)(18,25,27,24)(19,28,29,30)(23,31,26,32)(1,2)(3,6)(4,5)(7,8)(17,19)(18,26)(20,30)(21,28)(22,29)(23,27)(24,31)(25,32) involution — undirected(1,3)(2,6)(4,8)(5,7)(17,18)(19,26)(20,24)(21,25)(22,27)(23,29)(28,32)(30,31) 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.