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