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