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