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