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