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