One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,7)(3,6,8,5)(9,10)(11,12)(13,15)(14,16)(17,18,20,22)(19,23,24,21)(25,26,29,28)(27,30,32,31)(1,3)(2,5)(4,8)(6,7)(9,11,13,16)(10,14,15,12)(19,24)(21,23)(25,26,29,28)(27,31,32,30)(3,8)(5,6)(11,16)(12,14)(17,18)(19,21)(20,22)(23,24)(25,27,29,32)(26,30,28,31)(1,2)(3,6)(4,7)(5,8)(9,10)(11,12)(13,15)(14,16)(17,19)(18,21)(20,24)(22,23) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,12)(10,11)(13,14)(15,16)(17,18)(19,21)(20,22)(23,24)(25,28,29,26)(27,31,32,30)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.