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