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