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