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