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