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