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