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