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