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