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