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