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