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