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