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)(29,31)(30,32)(9,10)(11,14)(12,16)(13,15)(17,19,23,25)(18,24,26,21)(20,29,31,22)(27,30,32,28)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,20,24,30,23,31,21,28)(18,22,25,32,26,29,19,27)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,14,15,16)(17,21,23,24)(18,25,26,19)(20,30,31,28)(22,27,29,32)(9,12,13,11)(10,14,15,16)(17,22,21,27,23,29,24,32)(18,20,19,28,26,31,25,30)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.