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