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