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