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