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