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)(15,24)(16,29)(17,21)(18,22)(19,26)(20,32)(23,33)(25,40)(27,37)(28,35)(30,38)(31,36)(34,43)(39,41)(42,44) involution — undirected(1,2)(3,4)(6,10)(11,12)(13,15,18,26)(14,19,22,24)(16,25,30,42)(17,28,33,27)(20,34,36,39)(21,37,23,35)(29,44,38,40)(31,43,32,41)(2,4)(5,7,9,8)(6,11,10,12)(13,16,17,32,18,30,33,31)(14,20,23,29,22,36,21,38)(15,25,28,41,26,42,27,43)(19,34,35,44,24,39,37,40)(1,2)(3,4)(5,7,9,8)(6,11,10,12)(15,26)(16,30)(19,24)(20,36)(27,28)(29,38)(31,32)(35,37)(2,4)(5,8,9,7)(6,12,10,11)(13,17,18,33)(14,21,22,23)(15,27,26,28)(16,31,30,32)(19,35,24,37)(20,29,36,38)(25,41,42,43)(34,40,39,44)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.