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