One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(6,9)(7,11) involution — undirected(5,6)(7,10)(8,9)(11,12)(13,14,18,22)(15,23,25,39)(16,28,31,43)(17,32,24,21)(19,33,34,27)(20,36,38,30)(26,37,29,35)(40,44,42,41)(2,4)(13,15,24,33,18,25,17,27)(14,19,32,39,22,34,21,23)(16,29,36,41,31,26,30,44)(20,37,43,40,38,35,28,42)(5,7,8,11)(6,10,9,12)(15,25)(19,34)(23,39)(26,29)(27,33)(35,37)(40,42)(41,44)(6,9)(10,12)(13,16,24,36,18,31,17,30)(14,20,32,43,22,38,21,28)(15,26,33,44,25,29,27,41)(19,35,39,42,34,37,23,40)A 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.