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