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