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