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