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)(18,32)(19,23)(20,26)(25,39)(27,34)(28,36)(29,37)(30,35)(31,38)(33,42)(40,44)(41,43) involution — undirected(5,6)(7,10)(8,9)(11,12)(13,15,18,26,19,27,17,30)(14,20,22,24,23,35,32,34)(16,25,29,42,28,40,31,41)(21,33,38,39,36,43,37,44)(1,2,3,4)(6,9)(7,11)(16,28)(21,36)(25,40)(29,31)(33,43)(37,38)(39,44)(41,42)(5,7,8,11)(6,10,9,12)(13,16)(14,21)(15,25)(17,31)(18,29)(19,28)(20,33)(22,38)(23,36)(24,39)(26,42)(27,40)(30,41)(32,37)(34,44)(35,43)(6,9)(10,12)(13,17,19,18)(14,22,23,32)(15,26,27,30)(16,29,28,31)(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.