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