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