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