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