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