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