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