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