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