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