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