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