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