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)(11,15)(12,16)(13,14)(17,18)(19,22)(20,21)(23,24)(25,26,29,32)(27,30,31,28)(2,6)(4,7)(10,14)(12,15)(18,20)(22,23)(25,27,29,31)(26,30,32,28)(2,6)(3,8)(9,11,13,16)(10,12,14,15)(17,18,21,20)(19,23,24,22)(25,26)(27,30)(28,31)(29,32)(1,3,5,8)(2,7,6,4)(9,11)(10,15)(12,14)(13,16)(17,19,21,24)(18,22,20,23)(1,4,5,7)(2,8,6,3)(9,12,13,15)(10,11,14,16)(17,20,21,18)(19,23,24,22)(25,28,29,30)(26,31,32,27)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.