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