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