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