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