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