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