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