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