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