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