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