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