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