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