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