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