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