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