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