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)(11,15)(12,14)(13,16) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,18)(19,26)(20,23)(21,27)(22,25)(24,28)(29,30)(31,32) involution — undirected(2,5)(6,8)(10,14)(11,16)(17,19,26,18,22,23,20,25)(21,27,32,24,29,30,28,31)(10,14)(13,15)(17,20,22,26)(18,23,25,19)(21,28,29,32)(24,30,31,27)(1,3,4,7)(2,6,5,8)(17,21,20,28,22,29,26,32)(18,24,19,27,25,31,23,30)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.