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