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