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