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