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