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