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