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