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