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