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