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