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