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