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