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