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