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