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