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