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