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