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