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