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