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