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