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