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