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