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