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