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