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