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