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