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