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