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)(33,34,38,42,37,39,36,41)(35,43,45,48,44,40,46,47)(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)(35,44)(40,43)(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)(34,39)(35,44)(41,42)(45,46)(3,12)(7,10)(11,13)(15,16)(17,21,22,20)(18,25,26,24)(19,29,30,28)(23,32,27,31)(33,35,37,44)(34,40,39,43)(36,46,38,45)(41,48,42,47)(1,5,6,4)(2,8,9,14)(3,13,12,11)(7,15,10,16)(18,26)(23,27)(24,25)(31,32)(33,36,37,38)(34,41,39,42)(35,45,44,46)(40,47,43,48)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.