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