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