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