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