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