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