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