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