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)(19,29)(20,21)(22,26)(23,27)(24,28)(25,32)(30,31) involution — undirected(1,2,5,6)(3,7,4,8)(17,19)(18,25)(20,27)(21,31)(22,30)(23,26)(24,32)(28,29)(9,10)(11,15)(12,13)(14,16)(17,20,24,22)(18,21,28,26)(19,30,32,27)(23,29,31,25)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,21,24,26)(18,20,28,22)(19,31,32,23)(25,27,29,30)(1,3,5,4)(2,7,6,8)(17,22,24,20)(18,26,28,21)(19,30,32,27)(23,29,31,25)(1,4,5,3)(2,8,6,7)(17,23,24,31)(18,27,28,30)(19,26,32,21)(20,29,22,25)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.