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)(19,24,32,39,31,40,30,38)(20,33,34,41,36,42,35,25)(29,43,44,37,45,47,46,48)(1,2,7,13,5,9,4,6)(3,8,14,16,10,15,11,12)(17,19,21,32,23,31,22,30)(18,24,28,38,27,40,26,39)(20,29,35,44,36,45,34,46)(25,37,33,43,41,48,42,47)(1,3,5,10)(2,8,9,15)(4,11,7,14)(6,12,13,16)(17,20,22,34,23,36,21,35)(18,25,26,42,27,41,28,33)(19,29,30,46,31,45,32,44)(24,37,39,47,40,48,38,43)(2,9)(3,10)(6,13)(11,14)(17,21,23,22)(18,26,27,28)(19,30,31,32)(20,34,36,35)(24,38,40,39)(25,33,41,42)(29,44,45,46)(37,47,48,43)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.