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