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