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