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