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