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