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