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