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