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