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