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