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