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