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