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