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