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