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