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