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