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