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