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