One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,6)(3,9,4,8)(5,10,13,14)(11,16,12,15)(17,18,21,24)(19,25,27,22)(20,23,29,28)(26,31,32,30)(33,34,40,37)(35,38,41,36)(39,45,47,42)(43,44,48,46)(1,3,7,4)(2,8,6,9)(5,12,13,11)(10,16,14,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(33,35)(34,38)(36,37)(39,43)(40,41)(42,46)(44,45)(47,48)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,36,40,38)(34,41,37,35)(39,44,47,46)(42,48,45,43)(1,4,7,3)(2,9,6,8)(5,12,13,11)(10,16,14,15)(17,19)(18,22)(20,26)(21,27)(23,30)(24,25)(28,31)(29,32)(33,37,40,34)(35,36,41,38)(39,45,47,42)(43,44,48,46)(1,5)(2,10)(3,11)(4,12)(6,14)(7,13)(8,15)(9,16)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,38,40,36)(34,41,37,35)(39,44,47,46)(42,43,45,48)(1,6,7,2)(3,9,4,8)(5,10,13,14)(11,15,12,16)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(33,39,40,47)(34,42,37,45)(35,43,41,48)(36,44,38,46)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.