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