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