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