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