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