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