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