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