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