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