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