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