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