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