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