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