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