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