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)(17,18,20,24,21,25,28,23)(19,22,27,31,26,30,32,29)(33,34)(35,40)(36,41)(37,42)(38,43)(39,45)(44,48)(46,47)(1,3,5,11)(2,6,8,9)(4,10,12,16)(7,13,14,15)(17,19)(18,22)(20,27)(21,26)(23,29)(24,31)(25,30)(28,32)(33,35,36,44,37,45,38,46)(34,39,41,47,42,40,43,48)(4,12)(7,14)(10,16)(13,15)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31)(33,35,37,45)(34,40,42,39)(36,46,38,44)(41,47,43,48)(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(19,26)(22,30)(27,32)(29,31)(33,36,37,38)(34,41,42,43)(35,44,45,46)(39,47,40,48)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.