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