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