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)(19,25,27,22)(20,23)(21,24)(26,31,32,29)(28,30)(33,34,37,42,38,40,36,41)(35,39,44,46,43,47,45,48)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(20,28)(23,30)(26,32)(29,31)(33,35)(34,39)(36,45)(37,44)(38,43)(40,47)(41,48)(42,46)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,19)(18,22)(20,26)(21,27)(23,29)(24,25)(28,32)(30,31)(34,40)(35,43)(36,37)(46,48)(2,8)(6,9)(7,16)(14,15)(17,20,21,28)(18,23,24,30)(19,26,27,32)(22,29,25,31)(33,36,38,37)(34,41,40,42)(35,44,43,45)(39,46,47,48)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.