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