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