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