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