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