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