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