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