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