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