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