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)(11,13)(12,14)(15,16)(17,18,22,20,21,24,31,30)(19,23,28,29,26,25,27,32)(1,3)(2,4)(5,8)(6,7)(9,11,12,15)(10,13,14,16)(17,19,21,26)(18,23,24,25)(20,29,30,32)(22,28,31,27)(1,4,6,5)(2,7,8,3)(10,14)(13,16)(17,20,22,24,21,30,31,18)(19,25,27,29,26,23,28,32)(1,5,6,4)(2,7,8,3)(10,14)(13,16)(18,24)(20,30)(23,25)(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.