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