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