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