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