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