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