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