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