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