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