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