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