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