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