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