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