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