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