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