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