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