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