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