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)(25,26,29,33)(27,31,35,30)(28,36,37,32)(34,38,40,39)(1,3,5,8)(2,6,7,4)(9,10,14,15)(11,13,17,22)(12,16,19,23)(18,21,20,24)(25,26)(27,30)(28,32)(29,33)(31,35)(34,38)(36,37)(39,40)(1,3)(2,4)(5,8)(6,7)(12,19)(16,23)(18,20)(21,24)(25,27,29,35)(26,30,33,31)(28,34,37,40)(32,38,36,39)(1,4)(2,3)(5,6)(7,8)(9,11)(10,13)(12,20)(14,17)(15,22)(16,24)(18,19)(21,23)(25,26)(27,30)(28,36)(29,33)(31,35)(32,37)(34,39)(38,40) involution — undirected(9,12)(10,16)(11,18)(13,21)(14,19)(15,23)(17,20)(22,24)(25,27)(26,31)(28,34)(29,35)(30,33)(32,39)(36,38)(37,40) involution — undirected(9,13)(10,17)(11,15)(12,21)(14,22)(16,20)(18,23)(19,24)(25,28)(26,32)(27,34)(29,37)(30,38)(31,39)(33,36)(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.