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