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