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