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