One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,10,12,7)(4,14,9,6)(11,16,15,13)(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)(2,7)(4,15)(5,12)(6,13)(8,10)(9,11)(14,16)(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)(1,4,6,2,5,9,14,8)(3,11,13,10,12,15,16,7)(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)(2,8)(3,12)(4,9)(13,16)(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.