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