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