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