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