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