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