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