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