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