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