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