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