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