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