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