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