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