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