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