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