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