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