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