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