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