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