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)(20,30,31,26)(21,32,23,27)(1,3,5,4)(2,6,7,8)(9,10,13,14)(11,16,12,15)(17,19,22,29)(18,24,25,28)(20,23,31,21)(26,27,30,32)(1,4,5,3)(2,6,7,8)(9,11,13,12)(10,15,14,16)(18,25)(19,29)(20,31)(27,32)(9,11,13,12)(10,15,14,16)(17,20,23,29,22,31,21,19)(18,26,27,28,25,30,32,24)(2,7)(6,8)(9,12,13,11)(10,15,14,16)(17,21,22,23)(18,27,25,32)(19,20,29,31)(24,30,28,26)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.