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