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