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