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