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