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