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