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