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