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