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