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