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