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