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)(16,21)(17,23)(18,24)(19,35)(20,28)(22,32)(26,37)(27,40)(29,39)(30,44)(31,41)(33,38)(34,42)(36,43) involution — undirected(1,2,3,4)(13,15)(14,20)(16,30)(17,28)(18,33)(19,29)(21,40)(22,36)(23,25)(24,39)(26,32)(27,31)(34,43)(35,38)(37,42)(41,44)(6,9)(10,12)(13,16)(14,21)(15,26)(17,31)(18,34)(19,32)(20,36)(22,35)(23,41)(24,42)(25,37)(27,29)(28,43)(30,33)(38,44)(39,40) involution — undirected(2,4)(5,7,8,11)(6,10,9,12)(13,16)(14,22)(15,27)(17,31)(18,32)(19,34)(20,37)(21,35)(23,42)(24,41)(25,36)(26,29)(28,30)(33,43)(38,44)(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.