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