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