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