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