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