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