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