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