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