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