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