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)(7,11)(12,16)(13,15)(17,18)(19,22)(20,23)(21,24)(25,31)(26,29)(27,30)(28,32)(33,34,38,41)(35,39,37,45)(36,43,44,47)(40,46,48,42)(1,3,6,13)(2,7,9,16)(4,11,5,12)(8,15,14,10)(17,19)(18,22)(20,25)(21,26)(23,28)(24,29)(27,32)(30,31)(33,35,38,37)(34,39,41,45)(36,42,44,46)(40,47,48,43)(1,4,6,5)(2,8,9,14)(3,11,13,12)(7,15,16,10)(17,20)(18,23)(19,25)(21,27)(22,28)(24,30)(26,32)(29,31)(33,36,38,44)(34,40,41,48)(35,42,37,46)(39,47,45,43)(1,4,6,5)(2,8,9,14)(3,12,13,11)(7,10,16,15)(18,24)(22,29)(23,30)(28,31)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.