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