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