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