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