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