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