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