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