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