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