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