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