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