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