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