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