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)(20,31)(21,34)(24,35)(26,37)(27,43)(28,29)(32,33)(36,42)(38,47)(39,40)(44,45) involution — undirected(1,2,6,4)(3,7,11,10)(5,8,13,12)(9,15,14,16)(17,18,21,23,22,26,34,37)(19,24,28,35,30,40,29,39)(20,25,32,36,33,41,31,42)(27,38,43,46,44,47,45,48)(1,3)(2,7)(4,10)(5,14)(6,11)(8,16)(9,13)(12,15)(17,19)(18,24)(20,27)(21,28)(22,30)(23,35)(25,38)(26,40)(29,34)(31,45)(32,43)(33,44)(36,46)(37,39)(41,47)(42,48) involution — undirected(1,4,6,2)(3,10,11,7)(5,8,13,12)(9,15,14,16)(17,20)(18,25)(19,27)(21,32)(22,33)(23,36)(24,38)(26,41)(28,43)(29,45)(30,44)(31,34)(35,46)(37,42)(39,48)(40,47)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.