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