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