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