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