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