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