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