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