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