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