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