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