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