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