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