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