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