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