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