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