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