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