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