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