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