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