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