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