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