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