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