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