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