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