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