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