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