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