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