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