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