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