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