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