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