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