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