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