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