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