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