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