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