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