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