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