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