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