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