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)(12,15)(13,17)(14,18)(16,21)(20,24)(22,23) involution — undirected(1,2,5,8)(3,7,4,6)(10,15)(11,20)(12,13)(17,18)(19,23)(21,22)(2,6)(3,4)(7,8)(9,11)(10,16)(12,20)(13,21)(14,22)(15,19)(17,23)(18,24) involution — undirected(9,12,14,13)(10,15,18,17)(11,20,22,21)(16,19,24,23)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.