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