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