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