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