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