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