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