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