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