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