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