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)(11,15)(12,17)(13,16)(14,18)(19,22)(20,24)(21,23) involution — undirected(2,5)(3,8)(6,7)(9,11,14,20)(10,15,18,24)(12,19,13,21)(16,23,17,22)(10,16)(12,13)(15,22)(17,18)(19,21)(23,24) involution — undirected(2,5)(3,8)(6,7)(9,12,14,13)(10,17,18,16)(11,19,20,21)(15,22,24,23)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.