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