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)(14,19)(16,28)(20,33)(22,23)(24,39)(25,29)(30,42)(41,44)(5,6)(7,10)(8,12)(9,11)(13,14)(15,24)(16,21)(17,19)(18,22)(20,27)(23,31)(25,40)(26,39)(28,34)(29,43)(30,37)(32,33)(35,41)(36,44)(38,42) involution — undirected(2,4)(13,15,17,26)(14,20,19,33)(16,29,28,25)(18,32,31,27)(21,36,34,35)(22,24,23,39)(30,41,42,44)(37,43,38,40)(5,7,9,8)(6,10,11,12)(13,16,17,28)(14,21,19,34)(15,25,26,29)(18,30,31,42)(20,35,33,36)(22,37,23,38)(24,40,39,43)(27,41,32,44)(5,8,9,7)(6,10,11,12)(14,22)(18,31)(19,23)(20,24)(21,37)(27,32)(30,42)(33,39)(34,38)(35,40)(36,43)(41,44)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.