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)(19,28)(20,25)(21,24)(22,31)(23,27)(26,30)(29,32)(2,6)(5,7)(10,13)(14,16)(17,19,23,30)(18,24,27,32)(20,21,22,29)(25,26,31,28)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(17,20,23,22)(18,25,27,31)(19,29,30,21)(24,28,32,26)(3,8)(5,7)(17,21,23,29)(18,26,27,28)(19,20,30,22)(24,25,32,31)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.