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