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