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