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