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