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