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