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