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