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