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