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