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