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