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