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