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