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