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