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