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