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