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