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