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