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