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