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