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