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