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)(19,29,31,41)(20,34,36,44)(21,27,22,26)(24,33,40,32)(25,37,43,38)(30,39,35,42)(45,46,48,47)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,22,33,23,31,21,32)(18,24,27,41,28,40,26,29)(20,35,38,46,36,30,37,47)(25,42,34,45,43,39,44,48)(10,13)(14,16)(17,20,21,37,23,36,22,38)(18,25,26,44,28,43,27,34)(19,30,32,46,31,35,33,47)(24,39,29,45,40,42,41,48)(1,3,5,4)(2,7,8,6)(9,11)(10,14)(12,15)(13,16)(19,31)(20,36)(24,40)(25,43)(29,41)(32,33)(34,44)(37,38)(1,4,5,3)(2,6,8,7)(11,15)(14,16)(19,31)(24,40)(29,41)(30,35)(32,33)(39,42)(45,48)(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.