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