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