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