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