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