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