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