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