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