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