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