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