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