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)(11,15)(12,16)(13,14)(17,18,23,20)(19,28,31,32)(21,26,22,27)(24,29,25,30)(2,6)(7,8)(10,14)(11,12)(17,19,22,29,23,31,21,30)(18,24,26,32,20,25,27,28)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,19,21,30,23,31,22,29)(18,25,27,32,20,24,26,28)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(17,20,23,18)(19,25,31,24)(21,26,22,27)(28,30,32,29)(9,12,13,11)(10,16,14,15)(17,21,23,22)(18,26,20,27)(19,29,31,30)(24,28,25,32)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.