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