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