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