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