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)(20,28)(21,24)(23,30)(25,27)(26,32)(29,31)(33,34,39,36)(35,42,38,40)(37,41,45,44)(43,48,46,47)(2,6)(7,9)(8,13)(14,15)(17,19,21,27)(18,22,24,25)(20,29,30,26)(23,32,28,31)(37,45)(41,44)(43,46)(47,48)(3,10)(4,12)(7,9)(8,13)(17,18,21,24)(19,25,27,22)(20,23,30,28)(26,32,29,31)(33,35,39,38)(34,40,36,42)(37,43,45,46)(41,47,44,48)(1,3)(2,7)(4,11)(5,10)(6,9)(8,14)(12,16)(13,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,31)(28,30)(29,32)(33,36,39,34)(35,42,38,40)(37,44,45,41)(43,48,46,47)(1,4,5,12)(2,8,6,13)(3,11,10,16)(7,14,9,15)(17,19)(18,22)(20,26)(21,27)(23,31)(24,25)(28,32)(29,30)(33,37,39,45)(34,41,36,44)(35,43,38,46)(40,47,42,48)(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,20)(18,23)(19,26)(21,30)(22,31)(24,28)(25,32)(27,29)(33,38,39,35)(34,42,36,40)(37,46,45,43)(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.