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