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