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