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