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