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