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