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