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