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