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