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)(11,16)(12,15)(13,14)(17,18)(19,20)(21,22)(23,24)(25,26,29,31)(27,28,32,30)(2,4)(3,8)(9,11,14,15)(10,12,13,16)(18,21)(20,23)(27,32)(28,30)(2,4)(6,7)(10,13)(11,15)(17,19,22,24)(18,23,21,20)(25,27)(26,30)(28,31)(29,32)(1,3,5,8)(2,6,4,7)(9,12,14,16)(10,15,13,11)(17,20)(18,19)(21,24)(22,23)(1,4,5,2)(3,6,8,7)(9,13,14,10)(11,12,15,16)(17,21,22,18)(19,23,24,20)(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.