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