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