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