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