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