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