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