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