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