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