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