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