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