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