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