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