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