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)(17,18)(19,22)(20,23)(21,24)(25,32)(26,29)(27,30)(28,31)(1,3,5,4)(2,6,8,7)(17,19)(18,22)(20,27)(21,25)(23,30)(24,32)(26,28)(29,31)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(18,23)(19,25)(21,28)(22,29)(26,27)(30,32)(1,4,5,3)(2,6,8,7)(19,26)(21,28)(22,29)(24,31)(25,27)(30,32)(9,11,12,15)(10,14,13,16)(18,23)(19,27)(24,31)(25,26)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.