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