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