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