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