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