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