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