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