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