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