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)(17,18,23,31,22,25,21,20)(19,26,32,24,29,30,28,27)(9,10)(11,15)(12,14)(13,16)(17,19,22,29)(18,24,25,27)(20,30,31,26)(21,32,23,28)(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(11,16)(13,15)(17,20,21,25,22,31,23,18)(19,27,28,30,29,24,32,26)(1,4,5,3)(2,6,7,8)(10,14)(13,15)(18,25)(20,31)(24,27)(26,30)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.