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