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