One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,13)(8,16)(9,11)(10,14)(12,15)(17,19)(18,20) involution — undirected(1,2)(3,4)(6,11)(7,9)(12,16)(13,14)(15,19)(17,20) involution — undirected(2,4)(5,7,10,9)(6,11,14,13)(8,15,18,19)(12,16,17,20)(2,4)(5,6,10,14)(7,11,9,13)(8,17,18,12)(15,20,19,16)(5,8)(6,12)(7,15)(9,19)(10,18)(11,16)(13,20)(14,17) 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.