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