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