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