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