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