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