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