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