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