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)(13,14,19,23)(15,24,27,35)(16,21,18,34)(17,30,33,44)(20,28,37,25)(22,29,39,32)(26,38,31,36)(40,42,43,41)(2,4)(13,15,16,28,19,27,18,25)(14,20,34,35,23,37,21,24)(17,31,29,41,33,26,32,42)(22,38,44,40,39,36,30,43)(5,7,8,11)(6,10,9,12)(13,16,19,18)(14,21,23,34)(15,25,27,28)(17,29,33,32)(20,35,37,24)(22,30,39,44)(26,41,31,42)(36,43,38,40)(6,9)(10,12)(13,17,18,32,19,33,16,29)(14,22,21,30,23,39,34,44)(15,26,25,41,27,31,28,42)(20,36,24,40,37,38,35,43)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.