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