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)(17,18,21,25)(19,22,27,31)(20,23,28,24)(26,29,32,30)(34,39)(35,42)(36,37)(41,44)(43,45)(46,48)(1,2,6,9)(3,8,12,16)(4,7,5,13)(10,15,11,14)(17,19,21,27)(18,22,25,31)(20,26,28,32)(23,29,24,30)(33,34)(35,40)(36,44)(37,39)(38,41)(42,48)(43,47)(45,46)(1,3,6,12)(2,8,9,16)(4,11,5,10)(7,14,13,15)(18,23)(20,28)(22,29)(24,25)(26,32)(30,31)(33,35,38,43)(34,40,41,47)(36,42,37,45)(39,46,44,48)(1,4,6,5)(2,7,9,13)(3,10,12,11)(8,15,16,14)(35,43)(40,47)(42,45)(46,48)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.