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