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