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)(11,16)(12,17)(13,21)(14,15)(18,23)(19,20)(22,24)(25,26,31,36)(27,37,38,32)(28,33,29,34)(30,35,40,39)(1,2,4,6)(3,5,8,7)(9,10)(11,16)(12,17)(13,18)(14,15)(19,22)(20,24)(21,23)(25,27,31,38)(26,32,36,37)(28,35,29,39)(30,34,40,33)(1,2)(3,5)(4,6)(7,8)(10,15)(11,17)(18,21)(19,24)(25,28,31,29)(26,33,36,34)(27,35,38,39)(30,37,40,32)(1,3)(2,5)(4,8)(6,7)(9,11,14,17)(10,16,15,12)(13,19,23,24)(18,22,21,20)(25,26)(27,32)(28,33)(29,34)(30,35)(31,36)(37,38)(39,40)(9,12,14,16)(10,17,15,11)(13,22,23,20)(18,19,21,24)(25,29,31,28)(26,34,36,33)(27,35,38,39)(30,37,40,32)(9,13)(10,18)(11,19)(12,20)(14,23)(15,21)(16,22)(17,24)(25,30)(26,35)(27,34)(28,37)(29,32)(31,40)(33,38)(36,39) 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.