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