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