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