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