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