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