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