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)(17,18,22,23)(19,26,20,24)(21,25,29,30)(27,32,28,31)(33,34,39,37)(35,42,41,38)(36,44,47,40)(43,46,45,48)(1,2,6,3)(4,9,12,7)(5,8,13,10)(11,15,16,14)(18,23)(24,26)(25,30)(31,32)(33,35,39,41)(34,38,37,42)(36,45,47,43)(40,48,44,46)(2,3)(7,9)(8,10)(14,15)(17,19,22,20)(18,24,23,26)(21,27,29,28)(25,31,30,32)(33,34,39,37)(35,38,41,42)(36,44,47,40)(43,48,45,46)(1,3,6,2)(4,9,12,7)(5,10,13,8)(11,15,16,14)(17,18)(19,24)(20,26)(21,25)(22,23)(27,31)(28,32)(29,30)(33,36,39,47)(34,40,37,44)(35,43,41,45)(38,46,42,48)(1,4,6,12)(2,7,3,9)(5,11,13,16)(8,14,10,15)(17,20,22,19)(18,24,23,26)(21,27,29,28)(25,32,30,31)(33,37,39,34)(35,38,41,42)(36,40,47,44)(43,48,45,46)(1,5,6,13)(2,8,3,10)(4,11,12,16)(7,14,9,15)(17,21,22,29)(18,25,23,30)(19,27,20,28)(24,31,26,32)(33,38)(34,41)(35,37)(36,46)(39,42)(40,45)(43,44)(47,48)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.