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