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