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