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