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