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