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