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