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